The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152559 Largest term in row n of triangle A152555. 4
 1, 2, 7, 42, 495, 7436, 153361, 3853322, 116503839, 4127612326, 167061660005, 7671346786170, 392298901133895, 22113791358359574, 1365967717507556804, 91549507266620360316, 6624242349107514460269, 514871138228210665592112 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Compare to row sums of triangle A152555: 2*(2n+2)^(n-1). Triangle A152555 lists coefficients in a q-analog of the function LambertW(-2x)/(-2x). LINKS Table of n, a(n) for n=0..17. PROG (PARI) {a(n)=local(e_q=1+sum(j=1, n, x^j/prod(i=1, j, (q^i-1)/(q-1))), LW2_q=serreverse(x/(e_q+x*O(x^n))^2)/x); vecsort(Vec(polcoeff(LW2_q+x*O(x^n), n, x)*prod(i=1, n, (q^i-1)/(q-1))))[n*(n-1)/2+1]} CROSSREFS Cf. A152555, A152556(q=-1), A152557 (q=2) A152558 (q=3). Sequence in context: A005130 A091669 A108042 * A267239 A001174 A067975 Adjacent sequences: A152556 A152557 A152558 * A152560 A152561 A152562 KEYWORD nonn AUTHOR Paul D. Hanna, Dec 07 2008 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 27 18:18 EDT 2024. Contains 372880 sequences. (Running on oeis4.)